“Luzon Volcanic Arc”的意思、由来-开放百科全书

The Luzon Volcanic Arc is a chain of volcanoes in a north–south line across the Luzon Strait from Taiwan to Luzon. The name "Luzon Volcanic Arc" was first proposed by Carl Bowin et al.^[1]^[2] to describe a series of Miocene to recent volcanoes due to eastward subduction along the Manila Trench for approximately 1,200 km from the Coastal Range in Taiwan south to southern Mindoro in the Philippines. Islands that form part of the arc are the Eastern Coastal Range of Taiwan, Green Island, Taiwan, Orchid Island, Kaotai Rock, Mavudis or Y'ami Island, Mabudis, Siayan Island, Itbayat Island, Diogo Island, Batan Island, Unnamed volcano Ibuhos, Sabtang Island, Babuyan, Didicas, Camiguin Island. At the south end it terminates on Luzon.^[3] The geochemistry of a number of volcanoes along the arc have been measured. There are five distinct geochemical domains within the arc (Mindoro, Bataan, Northern Luzon, Babuyan, and Taiwan). The geochemistry of the segments verified that the volcanoes are all subduction related (e.g., strong niobium anomalies and calc-alkaline characteristics). Isotopes and trace elements show unique geochemical characteristics in the north. Geochemical variations northward (Babuyan segment) were due to the subduction of sediments derived from the erosion of continental crust from China and Taiwan.

There is a distinct increase in strontium isotopic ratios with latitude northward. This supports the conjecture that the variations were due to an increasing "crustal" component in subducted sediments as the continental blocks in the north were approached (China and Taiwan). The sediment thicknesses increased toward the north along the trench.^[4]

The geochemistry and tectonic setting of the southern Luzon arc has been studied in detail.^[5] The geochemistry suggested that continental crust (probably from sediments) played an important role in the Macolod corridor^[6] and the Mindoro segments. Crustal collision had occurred in the south between the North Palawan-Mindoro crustal block and perhaps sediment contamination was derived from this region. This substantiates preliminary early isotope and trace element studies on the central Luzon arc^[7]^[8]

Further work was done on the northern Luzon arc by McDermott et al.^[9] who found systematic variations in an assortment of isotopes with latitude not only in the lavas analyzed over the 500 km section of the arc but also in sediments along the trench. The only way to explain the latitudinal variations was through the addition of an increasing input of terrigenous sediments toward the continental regions in the north China and Taiwan

During the Middle Miocene, 16-15 Ma, activity started in Taiwan. Batan Island volcanics are dated at 9.36 Ma, while north of Luzon, the volcanic islands are younger than 6.5 Ma.^[10]

See Also

References

1. ^{{cite journal|last1=Bowin|first1=Carl|last2=Lu|first2=Richard S.|first3= Chao-Shing|last3=Lee|first4=Hans|last4=Schouten|title=Plate Convergence and Accretion in Taiwan-Luzon Region|journal=AAPG Bulletin|date=1978|volume=62|issue=9|pages=1645–1572|doi= 10.1306/C1EA5260-16C9-11D7-8645000102C1865D}}
2. ^{{cite journal|last1=DEFANT|first1=Marc J.|last2=Jacques|first2=Dario|last3=Maury|first3=Rene C.|last4=de Boer|first4=Jelle|last5=Joron|first5=Jean-Louis|title=Geochemistry and tectonic setting of the Luzon arc, Philippines|journal=Geological Society of America Bulletin|date=May 1989|volume=101|issue=5|pages=663–672|doi=10.1130/0016-7606(1989)101<0663:GATSOT>2.3.CO;2}}
3. ^The Times Atlas of the World, 1990, plate 19
4. ^{{cite journal|last1=Defant|first1=Marc J|last2=Maury|first2=RenéC|last3=Joron|first3=Jean-Louis|last4=Feigenson|first4=Mark D|last5=Leterrier|first5=Jacques|last6=Bellon|first6=Hervé|last7=Jacques|first7=Dario|last8=Richard|first8=Maryannick|title=The geochemistry and tectonic setting of the northern section of the Luzon arc (The Philippines and Taiwan)|journal=Tectonophysics|date=November 1990|volume=183|issue=1–4|pages=187–205|doi=10.1016/0040-1951(90)90416-6}}
5. ^{{cite journal|last1=Defant|first1=M. J.|last2=Maury|first2=R. C.|last3=Ripley|first3=E. M.|last4=Feigenson|first4=M. D.|last5=Jacques|first5=D.|title=An Example of Island-Arc Petrogenesis: Geochemistry and Petrology of the Southern Luzon Arc, Philippines|journal=Journal of Petrology|date=1 June 1991|volume=32|issue=3|pages=455–500|doi=10.1093/petrology/32.3.455}}
6. ^{{cite journal|last1=Defant|first1=Marc J.|last2=De Boer|first2=Jelle Z.|last3=Dietmar|first3=Oles|title=The western Central Luzon volcanic arc, the Philippines: two arcs divided by rifting?|journal=Tectonophysics|date=January 1988|volume=145|bibcode=1988Tectp.145..305D|issue=3–4|pages=305–317|doi=10.1016/0040-1951(88)90202-8}}
7. ^{{cite journal|last1=Knittel|first1=Ulrich|last2=Defant|first2=Marc J.|title=Sr isotopic and trace element variations in Oligocene to recent igneous rocks from the Philippine island arc: evidence for recent enrichment in the sub-Philippine mantle|journal=Earth and Planetary Science Letters|date=January 1988|volume=87|issue=1–2|pages=87–99|doi=10.1016/0012-821X(88)90066-0}}
8. ^{{cite journal|last1=Knittel|first1=Ulrich|last2=Defant|first2=Marc J.|last3=Raczek|first3=Ingrid|title=Recent enrichment in the source region of arc magmas from Luzon island, Philippines: Sr and Nd isotopic evidence|journal=Geology|volume=16|issue=1|pages=73–76|doi=10.1130/0091-7613(1988)016<0073:REITSR>2.3.CO;2|date=1988}}
9. ^{{cite journal|last1=McDermott|first1=F.|last2=Defant|first2=M. J.|last3=Hawkesworth|first3=C. J.|last4=Maury|first4=R. C.|last5=Joron|first5=J. L.|title=Isotope and trace element evidence for three component mixing in the genesis of the North Luzon arc lavas (Philippines)|journal=Contributions to Mineralogy and Petrology|date=January 1993|volume=113|issue=1|pages=9–23|doi=10.1007/BF00320828}}
10. ^{{cite journal |last1=Polve |first1=Mireille |last2=Maury |first2=Rene |last3=Jego |first3=Sebastien |last4=Bellon |first4=Jerve |last5=Margoum |first5=Ahmed |last6=Yumul |first6=Graciano |last7=Payot |first7=Betchaida |last8=Tamayo |first8=Rodolfo |last9=Cotten |first9=Joseph |title=Temporal Geochemical Evolution of Neogene Magmatism in the Baguio Gold-Copper Mining District (Northern Luzon, Philippines) |journal=Resource Geology |date=2007 |volume=57 |issue=2 |pages=197–218 |doi=10.1111/j.1751-3928.2007.00017.x }}